What did the acute triangle say to the obtuse triangle?
Nothing, triangles can't talk.
Triangle Talk
Explanation
Explain Bear
Listen up, smarty-pants. It's funny because everyone knows triangles are just shapes, right? They can't talk! This joke makes you think they can, but SURPRISE, they can't. It's called anti-humor. And you, with your brain, probably thought it was gonna be a math joke, didn't you?